<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */


/**
 * Smarty {mailto} function plugin
 *
 * Type:     function<br>
 * Name:     mailto<br>
 * Date:     May 21, 2002
 * Purpose:  automate mailto address link creation, and optionally
 *           encode them.<br>
 * Input:<br>
 *         - address = e-mail address
 *         - text = (optional) text to display, default is address
 *         - encode = (optional) can be one of:
 *                * none : no encoding (default)
 *                * javascript : encode with javascript
 *                * javascript_charcode : encode with javascript charcode
 *                * hex : encode with hexidecimal (no javascript)
 *         - cc = (optional) address(es) to carbon copy
 *         - bcc = (optional) address(es) to blind carbon copy
 *         - subject = (optional) e-mail subject
 *         - newsgroups = (optional) newsgroup(s) to post to
 *         - followupto = (optional) address(es) to follow up to
 *         - extra = (optional) extra tags for the href link
 *
 * Examples:
 * <pre>
 * {mailto address="me@domain.com"}
 * {mailto address="me@domain.com" encode="javascript"}
 * {mailto address="me@domain.com" encode="hex"}
 * {mailto address="me@domain.com" subject="Hello to you!"}
 * {mailto address="me@domain.com" cc="you@domain.com,they@domain.com"}
 * {mailto address="me@domain.com" extra='class="mailto"'}
 * </pre>
 * @link http://smarty.php.net/manual/en/language.function.mailto.php {mailto}
 *          (Smarty online manual)
 * @version  1.2
 * @author   Monte Ohrt <monte at ohrt dot com>
 * @author   credits to Jason Sweat (added cc, bcc and subject functionality)
 * @param    array
 * @param    Smarty
 * @return   string
 */
function smarty_function_mailto($params, &$smarty)
{
	$extra = '';

	if (empty($params['address'])) {
		$smarty->trigger_error("mailto: missing 'address' parameter");
		return;
	} else {
		$address = $params['address'];
	}

	$text = $address;

	// netscape and mozilla do not decode %40 (@) in BCC field (bug?)
	// so, don't encode it.
	$search = array('%40', '%2C');
	$replace  = array('@', ',');
	$mail_parms = array();
	foreach ($params as $var=>$value) {
		switch ($var) {
			case 'cc':
			case 'bcc':
			case 'followupto':
				if (!empty($value))
				$mail_parms[] = $var.'='.str_replace($search,$replace,rawurlencode($value));
				break;

			case 'subject':
			case 'newsgroups':
				$mail_parms[] = $var.'='.rawurlencode($value);
				break;

			case 'extra':
			case 'text':
				$$var = $value;

			default:
		}
	}

	$mail_parm_vals = '';
	for ($i=0; $i<count($mail_parms); $i++) {
		$mail_parm_vals .= (0==$i) ? '?' : '&';
		$mail_parm_vals .= $mail_parms[$i];
	}
	$address .= $mail_parm_vals;

	$encode = (empty($params['encode'])) ? 'none' : $params['encode'];
	if (!in_array($encode,array('javascript','javascript_charcode','hex','none')) ) {
		$smarty->trigger_error("mailto: 'encode' parameter must be none, javascript or hex");
		return;
	}

	if ($encode == 'javascript' ) {
		$string = 'document.write(\'<a href="mailto:'.$address.'" '.$extra.'>'.$text.'</a>\');';

		$js_encode = '';
		for ($x=0; $x < strlen($string); $x++) {
			$js_encode .= '%' . bin2hex($string[$x]);
		}

		return '<script type="text/javascript">eval(unescape(\''.$js_encode.'\'))</script>';

	} elseif ($encode == 'javascript_charcode' ) {
		$string = '<a href="mailto:'.$address.'" '.$extra.'>'.$text.'</a>';

		for($x = 0, $y = strlen($string); $x < $y; $x++ ) {
			$ord[] = ord($string[$x]);
		}

		$_ret = "<script type=\"text/javascript\" language=\"javascript\">\n";
		$_ret .= "<!--\n";
		$_ret .= "{document.write(String.fromCharCode(";
		$_ret .= implode(',',$ord);
		$_ret .= "))";
		$_ret .= "}\n";
		$_ret .= "//-->\n";
		$_ret .= "</script>\n";

		return $_ret;


	} elseif ($encode == 'hex') {

		preg_match('!^(.*)(\?.*)$!',$address,$match);
		if(!empty($match[2])) {
			$smarty->trigger_error("mailto: hex encoding does not work with extra attributes. Try javascript.");
			return;
		}
		$address_encode = '';
		for ($x=0; $x < strlen($address); $x++) {
			if(preg_match('!\w!',$address[$x])) {
				$address_encode .= '%' . bin2hex($address[$x]);
			} else {
				$address_encode .= $address[$x];
			}
		}
		$text_encode = '';
		for ($x=0; $x < strlen($text); $x++) {
			$text_encode .= '&#x' . bin2hex($text[$x]).';';
		}

		$mailto = "&#109;&#97;&#105;&#108;&#116;&#111;&#58;";
		return '<a href="'.$mailto.$address_encode.'" '.$extra.'>'.$text_encode.'</a>';

	} else {
		// no encoding
		return '<a href="mailto:'.$address.'" '.$extra.'>'.$text.'</a>';

	}

}

/* vim: set expandtab: */

?>
